Pebble or ball mill.



C. H. STAVE.

. PEBBLE OR BALL MILL.

` APPLICATION FILED MAR.4, 1918. 1,283,589. Patented Nov. 5, 1918.

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- CHARLES HENRY sravn, or THORNTON, ILLINOIS.

PEBB'LE on BALL Minn.

of Thornton, in the county of Cook and f State of Illinois, haveinventeda new and Improved Pebble or Ball Mill, of whichthew followingis a description.

My invention relates to a grinding or reducing mill adapted to receiveballs or pebbles and mounted to be turned, whereby the material isreduced by the action of the balls or pebbles with the turning of themill.

The invention more particularly relates to a mill designed to reducechemicals or other materials to line powder.

The prime object of the invention is to provide a pebble or ball mill inwhich the drum or cylinder will be disposed with its axis transectingthe axis about which the mill turns whereby to eiect increased reducingaction by a more frequent and more thorough tumbling of the reducingelements and the material.

Reference is to be had to the accompanying drawings, it being understoodthat the drawings are merely illustrative of one example of theinvention.

Figure 1 is a side elevation of a mill embodying my invention;

Fig. 2-is a plan view thereof;

Fig. 3 is a longitudinal vertical section thereof as indicated by theline 3 3, Fig. 2.

In the illustrated example a suitable base 10 is provided havingstandards 11 provided at the top with bearings 12 on which the trunnions13 of the mill turn, one of the trunnions having a suitable handle 111or other means whereby the mill may be turned.

The trunnions are on a frame or holder designated generally by thenumeral 15. The drum or cylinder 16 in my improved mill is carried byframe or holder 15, to the ends 15a of which the trunnions are secured.The holder is equipped with means to clamp the'drum 16 in position withits axis transecting the axis of rotation of the holder. In theillustrated example the holder frame 15 is open at the center to receivethe cylinder i Specification of Letters Patent'.

holder and at opposite sides thereof, means is provided on the holderframe `proper and its 'clamp' frame 17 to engage and retain the cylinderat its ends. In the illustrated form `a seat 21 extends from the holder15 at one sidethereof, oblique to the general plane of said holder andhas an annular flange 21a in a position to overlap the drum or cylinderand at the opposite end of the holder 15 and at the same side as theseat 21 is a concave seat 22 on which the opposite end of the cylinderrests at a side of the cylinder.

Similarly, there is provided on the clamp frame 17 an oblique seat 23having a flange 23a and at the opposite end of said frame 17 there is aconcave seat 24, said parts 23,k

23a, 24 corresponding with the parts 21, 21 and 22- The loosening of thenuts 19 permits the removal of the clamp frame 17 and Patented Nov. 5,1918.

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with it the seats 23, 24, thereby vpermitting the ready placing orremoval of the cylinder when desired. The cylinder is provided with aremovable head 25 which is held in position by any suitable means as bya bayonet lock, there being indicated pins 26 on` the cylinder andbayonet slots 27 in the head' 25. Thus, the removal of the clamp frame17 readil permits of the removal of the head 25 or charging or emptyingthe cylinder.

It will be seen that with the described construction in the turning ofthe cylinder about the axis of the holder 15, the material to be reducedand the reducing balls or pebbles will alternately shift from one end ofthe cylinder toward the other, thereby producing a more effectiveinterchange of the contents of the mill and a more effective grindingimpact of the grinding elements.

I would state in conclusion that while the illustrated exampleconstitutes a practical embodiment of my invention, I do not limitmyself strictly to the mechanical details herein illustrated, sincemanifestly the same can be considerably varied without departure fromthe spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent:

1. A ball or pebble mill including a support, a holder revolubly mountedin said support, a cylinder disposed in said holder in position at anangle thereto and crossing the axis of revolution of the holder, a clampon the holder at one side, said holder at one side thereof having seatsfor said cylinder at opposite ends of the holder, and the said clamphaving corresponding seats thereon at its opposite ends.

2. A ball or pebble mill including a revoluble holder7 a cylinder in theholder vdiepoee'd oblique to the axis of revolution of the holder, a.seat extending from the holder at one Side adjacent to an end of theholder and oblique to the axis of revolution of the holder adapted toengage the cylinder at one end, a similar concave seat on the holder atmentioned seat or holder and at the opposite end of the cylinder, aconcave seat on the clamp at the Saline side es the rst seat but at theopposite end of the clamp, and Ineens to detaehably secure said clamp inposition.

CHARLES HENRY STAVE.

Copies of this patent may be obtained for v'e cents each, by addressingthe Commissioner of atents, Washington, D. C.

